How do I report an OSMI false positive?

I have sent a report to info at geofabrik.de but have not received an acknowledgement; I know they are always busy! I think, but am not sure, that I have found a false positive: Example Link http://tools.geofabrik.de/osmi/?view=routing&lon=-7.69586&lat=40.92914&zoom=18&opacity=0.58&overlays=duplicate_ways I can find nothing wrong pertaining to duplicate_ways to correct. I have come across many duplicate_way errors like this. Always a roundabout at the end of a way